Some things just seem objectively impossible, and cutting a droplet of water in half — actual water, not ice — certainly seems like one of them.
Antonio Garcia of Arizona State University never thought so, and along with his colleagues, Garcia managed to create a knife that can do just that. They created a superhydrophobic knife — one that really hates water, in layman’s terms.
In the video above, you can see the knife in action. Garcia’s team place the drop of water on hydrophobic Teflon and used pieces of wire to hold it in place. The result is plain mind-boggling for the non-science-inclined like us.
New Scientist explains some of the science behind the experiment:
When they lowered a knife into a water drop, it was split in two, each half attached to a loop of wire (see video below). The drops were somewhat resistant to cutting, however, as lifting the knife mid-slice allowed the drops to bounce back to their original shape.
Superhydrophobic knifes like these may have practical applications in biomedical research, allowing researchers to separate and identify proteins more efficiently.